Abstract: The present invention relates to a process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction which comprises: feeding the aqueous stream containing organic by products of the reaction to a fractionating distillation column or to a stripping column; —condensation of the vaporized stream leaving the head of the column and the removal of a distillate enriched in the heaviest by-products; —feeding the partially purified aqueous stream leaving the bottom of the distillation column, at the head to one or more sensible contact exchangers; —sending a process gas in countercurrent to the tail of the exchanger at a temperature lower than that of the aqueous stream; —sending the process gas enriched in water and part of the residual organic product leaving the head of the exchanger to the Fischer-Tropsch synthesis plant of hydrocarbons; —sending the purified colder water leaving the exchanger directly to further treatment.

Abstract: The present invention relates to a process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction which comprises: feeding the aqueous stream containing organic by products of the reaction to a fractionating distillation column or to a stripping column; —condensation of the vaporized stream leaving the head of the column and the removal of a distillate enriched in the heaviest by-products; —feeding the partially purified aqueous stream leaving the bottom of the distillation column, at the head to one or more sensible contact exchangers; —sending a process gas in countercurrent to the tail of the exchanger at a temperature lower than that of the aqueous stream; —sending the process gas enriched in water and part of the residual organic product leaving the head of the exchanger to the Fischer-Tropsch synthesis plant of hydrocarbons; —sending the purified colder water leaving the exchanger directly to further treatment.

Abstract: Partial oxidation process of liquid fuels, selected from hydrocarbon and/or oxygenated compounds, together with gaseous fuels, selected from hydrocarbon compounds, natural gas and LPG, by means of a suitable catalytic system comprising the following steps: premixing the reagents and possibly heating them to temperatures ranging from 25 to 400° C., said reagents consisting of said liquid fuels, said gaseous fuels and oxygen or air or oxygen enriched air, optionally in the presence of vapour and/or CO2; reacting the mixture of reagents in the catalytic zone, at inlet temperatures ranging from 50 to 500° C. and space velocities ranging from 1,000 to 1,000,000 Nl reagents/L cat×h, reaching temperatures ranging from 450 to 1350° C.

Abstract: Hydrocarbons are prepared, liquid at the reaction temperature, by feeding synthesis gas into three-phase turbulent reactors in which the solid phase, consisting of the catalyst in the form of particles, is kept in suspension in the liquid phase by the rising synthesis gas. The reaction product is separated/filtered in continuous from the catalyst dispersed therein by means of at least one filtration device consisting of a hydrocyclone over which there is a first hollow metal element in which a second hollow element is situated, coaxial with the first, made of a material having a porous structure, with an average pore diameter ranging from 0.002 to 0.1 micrometers, suitable for micro/ultrafiltration.

Abstract: Hydrocarbons are prepared, liquid at the reaction temperature, by feeding synthesis gas into three-phase turbulent reactors wherein the solid phase, consisting of the catalyst in particle form, is kept in suspension in the liquid phase by the rising synthesis gas. The reaction product is separated/filtrated in continuous from the catalyst dispersed therein, by means of a separation/filtration unit consisting of several filtration cartridges, each consisting of at least two porous filtering elements, the first having an average pore diameter ranging from 0.5 to 15 ?m, whereas the second has an average pore diameter ranging from 0.002 to 0.1 ?m.

Abstract: Production of atmospheric distillate from a hydrocarbon feedstock that comprises a stage for the formation of a gas mixture that contains hydrogen and carbon monoxide, an at least partial conversion stage of the gas mixture that is obtained so as to obtain a liquid effluent that contains hydrocarbons and a gas effluent that contains carbon dioxide, a stage for treating the gas effluent under conditions that make it possible to eliminate the carbon dioxide at least partly, a first stage of fractionation of the liquid fraction, an isomerizing hydrocracking stage in the presence of hydrogen and a second fractionation stage.

Abstract: Process for the production of hydrocarbons from synthesis gas which comprises: a) feeding to the bottom of a reactor for Fischer-Tropsch reactions a synthesis gas with molar ratios H.sub.2 /CO ranging from 1 to 3;b) discharging from the head of the reactor a hydrocarbon liquid phase containing the catalyst, in suspension;c) feeding the suspension to at least a first hydrocyclone to obtain a partially separated product containing from 0.5 to 15% by volume of solid particles;d) feeding the partially separated product to at least a second hydrocyclone to obtain a stream of liquid substantially without solid particles.

Abstract: A synthetic, crystalline, porous material is disclosed, together with the related preparation process. Such material of zeolitic nature containing oxides of silicon, titanium and gallium corresponds, in the calcined and anhydrous state, to the following empyrical formula:pHGaO.sub.2.qTiO.sub.2.SiO.sub.2,wherein p has a value greater than zero and smaller than or equal to 0.050, and q has a value greater than zero and smaller than or equal to 0.025, and the H.sup.+ of HGaO.sub.2 can be at least partially replaceable or replaced by cations.

Abstract: Process for the preparation of a catalyst including an inert support, cobalt, ruthenium and a third element selected from scandium and yttrium, comprising at least the following steps:1) Preparation of a first catalytic precursor (A) containing cobalt and the inert support: subsequent calcination, reduction and passivation;2) Preparation of a second catalytic precursor (B) containing cobalt, ruthenium and the inert support, by means of the deposition of ruthenium on the first catalytic support (A): subsequent calcination, reduction and passivation3) Preparation of the final catalyst by means of the deposition of an element selected from scandium and yttrium on the catalytic precursor (B); subsequent calcination, reduction and passivation.

Abstract: Process for the epoxidation of olefins with oxygen and/or air and a redox system, in the presence of titanium silicalite, characterized in that the redox system is selected from:1) quinone/hydroquinone derivatives having the general formula (Ia) and (Ib) ##STR1## 2) acetophenone/1-phenyl ethanol derivatives having the general formula (IIa) and (IIb) ##STR2##

Abstract: A process for the alkylation of aliphatic hydrocarbons with olefins catalyzed by a silica-based material, characterised in that the surface Si--OH groups of said silica are esterified with a fluoroalkylsulphonic acid of formula CF.sub.3 (CF.sub.2).sub.n SO.sub.3 H, where n is a whole number between 0 and 11, said material having a Hammett acidity Ho.ltoreq.-11.4.

Abstract: A method is disclosed for preparing complexes of metals of the VIII Group of the Periodic Table, useful as hydrogenation catalysts. The method, as a single-step process, comprises reacting a polymeric complex containing V Group elements and VIII Group metal compounds directly with a metal atom which is directly bound to the V group element in the presence of a reducing substance. The reducing substance is selected among alkali metal and alkaline earth metal hydrides, mixed alkaline-III group element hydrides, organic metallic compounds of III Group metals, alkali metal and alkaline earth metal alkyls, Grignard compounds.